Calorias

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RBTI / ARTIGO ORIGINAL

Análise comparativa do gasto energético entre as equações de Harris-Benedict e de Long e a calorimetria indireta em pacientes sépticos.
Comparative analysis of energy expenditure between Harris-Benedict and Long’s equations and indirect calorimetry in septic patients.
Francisco Antonio Coletto*, Flávio Marson*, Antonio Dorival Campos**, Júlio Sérgio Marchini***, Anibal Basile-Filho****

ABSTRACT
The measurement of accurate resting energy expenditure (REE) in critically ill patients is important to assess nutritional needs. The purpose of this study is to compare Harris-Benedict equation (H-B) and its correction for injury factors (CALC) and the indirect calorimetry (IC), in septic patients.
A total of 28 patients were enrolled in the study (15 males and 13 females), ranging from 46.6 ± 19.5 years old. The
APACHE II was 23.7 ± 7.8 with a risk of death of 48.5 ± 27.5. The sepsis score was 22 ± 7.7. The REE was obtained by IC at four different times (T1, T2, T3 and T4) in a steady patient for at least 30 minutes. The patients were divided in two groups; GI – n=19 – with four hourly measurements and GII – n=9 – with one measurement. The REECI mean values to GI, from T1 to T4 were 1625, 1660, 1685 and 1705 kcal.d-1, respectively and 1351 kcal.d-1 to GII. The
REEH-B means were 1507.5 ± 208.1 (GI) and 1317.1 ± 240.7 kcal.d-1 (GII). When Long’s injury correction factors were introduced, and the REE values increased in both groups (GI = 2894.5 ± 399, 6; GII = 2528.8 ± 462.1 kcal.d1
). As expected, the REEH-B shown a difference from REECI (p=0.02). However, with the correction factors, we observed a statistical difference in both groups. For all patients, there was a variation of only 7.6% between REECI and REEH-B, and an increase